[scenerium] syntax error

hi Julie eguiluz

as i see you are trying to make a script when user clicked the object disable and when he click again the same project enabled.

you can always play tricks with 0 coding  using behavior script

1 : lest duplicate 2 images and make the alpha to 0

: on the both images use a touch input
enable the first image and disable the second image

now in the first image add a behavior script and make the setting on tap event
and the respond make set enable 
the target will many so you will have to copy the script 3 times

the fist target disable the image1 
the second target enable the  imagee
3rd target enable the project you want

do the same things to the image2 
but this time disable image 2 and the object target
and enable the image one

this is an example project 
just click on screen to enable and disable the sphere on any thing you want

http://www.mediafire.com/file/r8gpcnyai1g16ew/enable+disable+by+click.zip/file

i notice you said the word ( change by tap )
if you mean to tap and change between many objects
use this script its working fine

// -----JS CODE-----
// @input SceneObject[] obj

var count = 0;
script.obj[0].enabled = true ;

for (var i = 1;i < script.obj.length; i++)
{

script.obj[i].enabled = false ;

}

function onTapped(eventData)
{
count++;
for (var i = 0;i < script.obj.length; i++)
{
if (count == i)
{
script.obj[i].enabled = true ;
}
else {
script.obj[i].enabled = false ;
}

}
if (count == script.obj.length)
{
count = 0;
script.obj[0].enabled = true;

}

}
var event = script.createEvent("TapEvent");
event.bind(onTapped);

i hope that helped 

Cheers.